clocksource/drivers/arm_arch_timer: Remove unneeded pr_fmt macro

After this commit ded24019(clocksource: arm_arch_timer: clean up
printk usage), the previous macro is redundant, so delete it.

And move the new macro to the previous position.
Signed-off-by: Yangtao Li <tiny.windzz@gmail.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>

drivers/clocksource/arm_arch_timer.c

@@ -9,7 +9,7 @@
  * published by the Free Software Foundation.
  */
 
-#define pr_fmt(fmt)	"arm_arch_timer: " fmt
+#define pr_fmt(fmt) 	"arch_timer: " fmt
 
 #include <linux/init.h>
 #include <linux/kernel.h>
@@ -33,9 +33,6 @@
 
 #include <clocksource/arm_arch_timer.h>
 
-#undef pr_fmt
-#define pr_fmt(fmt) "arch_timer: " fmt
-
 #define CNTTIDR		0x08
 #define CNTTIDR_VIRT(n)	(BIT(1) << ((n) * 4))